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The quick method for a confidence interval for a proportion uses p ±1/√n as an approximation for a 95% confidence interval. The margin of error in this case is slightly larger than necessary. Suppose that a simple random sample of 500 motorcycle registrations finds that 68 of the motorcycles are Yamahas. Give a 95% confidence interval for the proportion of motorcycles in the population that are Yamahas using the quick method of chapter 3 and then by the more precise method of chapter 21.
What does the confidence level of a confidence interval tell you?
Suppose that a population has mean, µ, and standard deviation, σ. What does the central limit theorem tell us about the distribution of the sample mean?
Government regulations indicate that the total weight of cargo in a certain kind of airplane cannot exceed 310 kg. On a particular day a plane is loaded with 100 boxes of a particular item only. Historically, the weight distribution for the individual boxes of this variety has a mean of 3.2 kg and standard deviation 0.4 kg.
a. Interpret the meaning of the "a mean of 3.2 kg" in terms of repeated samplng.
b. what is the distribution of the sample mean weight for the boxes (give the name of the distribution and appropriate parameter values)?
c. What is the probability that the government regulation is met?
A company wishes to issue new preference shares; the company will incur flotation cost of 2% per share. the market value of this shares is $90 per share & a nominal value of $100 p
For this assignment, you will have to review each column and make a decision for how to adjust for the missing data. After you correct for missing data in each column, please des
journal article about capture theory,economic intrest thery,public intrest theory
You have recently joined XYZ, an international company that produces a wide range of office supplies and stationary goods. In your new role as Group Management Accountant your firs
Derive the profit function P (p) and the supply function (or correspondence) y (p)for the following three Single-output technologies, whose production functions f (z) are:
Question 1: A mail-order firm has a circular which elicits a 10% response rate. Suppose 20 of the circulars are mailed as a market test in a new geographic area. Assuming that
A survey was conducted among the residents of Pune City, its suburbs and the Pune Cantonment area. The following three pie diagrams show their respective preferences for living in
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Lifts usually have signs indicating their maximum capacity. Consider a sign in a lift that reads “maximum capacity 1400kg or 20 persons”. Suppose that the weights of lift-users are
In 2009, the average number of runs scored in the National League was approximately 4.5 per team. Therefore, a team has done an adequate job with its offense if it scores at least
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